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Old June 27th 14, 04:14 AM posted to rec.photo.digital
Floyd L. Davidson
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Posts: 5,138
Default Nikon D810 hands-on review: “The highest image quality in a Nikon DSLR to date”

nospam wrote:
In article , Floyd L. Davidson
wrote:


Sounds a bit unlikely, given the fact that it has a low pass filter, right?


It *doesn't* have an optical low pass filter.

If that is a good thing (actually it's good marketing,
but not good engineering), this camera should beat the
D800E because it isn't a case of reversing an effect as
the D800E does, but not having the filter at all.

I mean, even if the processor is a lot better, the D800E still has the
resolution.


It is clearly an open debate on what "has the
resolution" actually means! The D800 and the D800E have
exactly the same resolution, with a slightly different
distritution of noise. The D800E (and the D810 too) has
a broader noise distribution because aliasing products
are allowed at all spatial frequencies below the Nyquist
limit, while the D800 has reduced SNR very close to the
Nyquist limit but does not have a broad spectrum of
aliasing extending well below Nyquist.

Resolution is the same either way.


the number of pixels is the same either way, but that is *not* the same
as resolution.

the resolution of the two cameras will be different since one has an
anti-alias filter attenuating high spatial detail and the other does
not. whether that's noticeable or not is questionable.


The anti-alias filter on a D800 does not attenuate high
spatial detail enough to affect resolution. (Proof of that
is the fact that on occasion moire effects can be seen in
images shot with the D800.)

Both the D800 and the D800E have resolution limited by
the sampling frequency, not by the filtering.

the differences are generally minor and likely not all that noticeable
without pixel peeping and/or knowing what to look for. typically, other
factors will eliminate any difference, such as focus errors, camera
shake, etc.


Even if one knows exactly what to look for, it isn't
something that pixel peeping makes visibly distinct.
All that changes is the type of noise and its
distribution in the frequency spectrum.

That does not change resolution unless it is rather
extreme, which is not the case with these cameras.

--
Floyd L. Davidson http://www.apaflo.com/
Ukpeagvik (Barrow, Alaska)